And, in case you're getting confused by now Cheryl, the tongue IS included in the UVW of the trailer. A weight distributing hitch, which is what you mount into the receiver on your tow vehicle (the square tube) weighs probably in the neighborhood of 70#, if it's like my Equal-I-Zer (which is one of the heaviest ones). There are others that weigh less. This weight is not applied to the trailer. It is carried by your tow vehicle.
Hi-Lo 1707T - Tire Minder TPMS on Tow Vehicle and Trailer, 300W Solar Battery Charger, Equal-i-zer WDH
2014 F150 Platinum 4x4 3.5L EcoBoost SCrew